Search for Long-Lived Particles Decaying in the CMS End Cap Muon Detectors in Proton-Proton Collisions at \sqrt s s ​ =13  TeV

Physical Review Letters 2021
Toms Torims, Viesturs Veckalns, CMS Collaboration

A search for long-lived particles (LLPs) produced in decays of standard model (SM) Higgs bosons is presented. The data sample consists of 137  fb-1 of proton-proton collisions at s=13  TeV, recorded at the LHC in 2016–2018. A novel technique is employed to reconstruct decays of LLPs in the end cap muon detectors. The search is sensitive to a broad range of LLP decay modes and to masses as low as a few GeV. No excess of events above the SM background is observed. The most stringent limits to date on the branching fraction of the Higgs boson to LLPs subsequently decaying to quarks and τ+τ- are found for proper decay lengths greater than 6, 20, and 40 m, for LLP masses of 7, 15, and 40 GeV, respectively.

DOI
10.1103/physrevlett.127.261804
Hyperlink
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.127.261804

The CMS Collaboration, Tumasyan, A., Torims, T., Veckalns, V. ... [et al.] Search for Long-Lived Particles Decaying in the CMS End Cap Muon Detectors in Proton-Proton Collisions at \sqrt s s ​ =13  TeV. Physical Review Letters, 2021, Vol. 127, No. 26, Article number 261804. ISSN 0031-9007. e-ISSN 1079-7114. Available from: doi:10.1103/physrevlett.127.261804

Publication language
English (en)